Diamond (or Cubic Zirconia)
Crystallized Carbon (C) for Diamond; Zirconium Dioxide (ZrO2) for CZ
mineral
Category
Synthetic (Not A Natural Rock)
Browse synthetic (not a natural rock) specimens identified by the Rock Identifier community.
Learn about Synthetic (Not A Natural Rock) in the encyclopedia
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Ametrine
SiO2 (Silicon Dioxide with iron impurities)
gemstone
Opalite Egg
Synthetic Glass (Simulated Opal)
mineral
Opalite
Man-made Opalized Glass (Synthetic Glass)
gemstone
Opalite
Synthetic Glass (Amorphized Silicon Dioxide)
mineraloid
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Grey River Pebble (Likely Quartz-rich or Limestone)
Clastic Sedimentary Rock (typically SiO2 or CaCO3 based)
sedimentary
Diamond (or Cubic Zirconia simulant)
C (Carbon) or ZrO2 (Zirconium Dioxide)
gemstone
Blue Sapphire (likely lab-grown or treated)
Corundum (Aluminum Oxide, Al2O3)
gemstone
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Diamond
Diamond (C)
gemstone
Dyed Agate Slice
Silicon Dioxide (SiO2) with artificial dyes
mineral
Painted River Rock
Painted Quartzite or Smooth Siltstone
sedimentary
Blue Sapphire
Corundum (Al2O3 with Cr, Fe, and Ti trace elements)
gemstone
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Quartz pebble in concrete
Quartz (SiO₂), embedded in Portland-cement concrete
mineral
Goldstone (with Tiger's Eye and Quartz)
Aventurine glass (Synthetic SiO2 with Cu inclusions)
mineral
Ruby
Corundum (Al2O3)
mineral
Blue opalite (often sold as synthetic opal)
Opalite glass; amorphous hydrated silica if natural opal (SiO₂·nH₂O)
gemstone
Sapphire
Corundum (Al2O3)
gemstone
Blue Goldstone
Aventurine Glass
Man-made mineral simulant (Glass)
Diamond or Cubic Zirconia
Carbon (diamond) or Zirconium dioxide (cubic zirconia)
gemstone
Red gemstone ring, likely garnet or synthetic ruby
Possibly almandine garnet (Fe₃Al₂(SiO₄)₃) or corundum/ruby (Al₂O₃); image alone cannot distinguish
gemstone
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Green Glass (often marketed as 'Obsidian' or 'Green Quartz')
Amorphous Silica (SiO2) with copper or chromium additives
Mineraloid (Man-made)
Opaline Glass (Opalite)
Synthetic Silicon Dioxide Glass
Mineraloid (Man-made)
Blue Quartz / Glass Gemstone Pendant
SiO2 (Silicon Dioxide) or Synthetic Glass
gemstone
Orgonite Pyramid (containing Amethyst and mixed minerals)
Silicon Dioxide (SiO2) in synthetic resin
gemstone
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Opalite
Synthetic Opalised Glass
Mineral (Synthetic / Man-made)
Cubic Zirconia (as a jewelry specimen)
Zirconium dioxide (ZrO2)
mineral
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Cubic Zirconia
Zirconium Dioxide (ZrO2)
mineral
Opalite
Man-made opalized glass
mineral
Faceted Diamond or Cubic Zirconia
Carbon (C) for Diamond; Zirconium dioxide (ZrO2) for CZ
mineral
Opalite
Synthetic Opalized Glass / Man-made Glass
gemstone
Asphalt (Road Aggregate)
Bituminous Conglomerate / Asphalt Concrete
Anthropogenic (Man-made)
Emerald
Beryl (Be₃Al₂Si₆Oထ₈) with Chromium/Vanadium impurities
gemstone
Cubic Zirconia (CZ)
Cubic Zirconium Dioxide (ZrO2)
mineral (synthetic)
Silicon Carbide (Carborundum)
Moissanite (SiC), though mostly synthetic
mineral
Opalite
Synthetic Glass (SiO2 + impurities)
mineral